<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .icon {
      /* 设置可以点击区域 */
      width: 48px;
      height: 48px;
    }
    .icon::before {
      content: '';
      display: inline-block;
      /* 这些都可以适当调高一点，这样点击区域就变大了 */
      width: 56px;
      height: 56px;
    }
  </style>
</head>
<body>
  
</body>
</html>